issues: 168901028
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| 168901028 | MDU6SXNzdWUxNjg5MDEwMjg= | 934 | Should indexing be possible on 1D coords, even if not dims? | 5635139 | closed | 0 | 6 | 2016-08-02T14:33:43Z | 2019-01-27T06:49:52Z | 2019-01-27T06:49:52Z | MEMBER | ``` python In [1]: arr = xr.DataArray(np.random.rand(4, 3), ...: ...: [('time', pd.date_range('2000-01-01', periods=4)), ...: ...: ('space', ['IA', 'IL', 'IN'])]) ...: ...: In [17]: arr.coords['space2'] = ('space', ['A','B','C']) In [18]: arr Out[18]: <xarray.DataArray (time: 4, space: 3)> array([[ 0.05187049, 0.04743067, 0.90329666], [ 0.59482538, 0.71014366, 0.86588207], [ 0.51893157, 0.49442107, 0.10697737], [ 0.16068189, 0.60756757, 0.31935279]]) Coordinates: * time (time) datetime64[ns] 2000-01-01 2000-01-02 2000-01-03 2000-01-04 * space (space) |S2 'IA' 'IL' 'IN' space2 (space) |S1 'A' 'B' 'C' ``` Now try to select on the space2 coord: ``` python In [19]: arr.sel(space2='A') ValueError Traceback (most recent call last) <ipython-input-19-eae5e4b64758> in <module>() ----> 1 arr.sel(space2='A') /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/xarray/core/dataarray.pyc in sel(self, method, tolerance, indexers) 601 """ 602 return self.isel(indexing.remap_label_indexers( --> 603 self, indexers, method=method, tolerance=tolerance)) 604 605 def isel_points(self, dim='points', **indexers): /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/xarray/core/dataarray.pyc in isel(self, indexers) 588 DataArray.sel 589 """ --> 590 ds = self._to_temp_dataset().isel(indexers) 591 return self._from_temp_dataset(ds) 592 /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/xarray/core/dataset.pyc in isel(self, **indexers) 908 invalid = [k for k in indexers if k not in self.dims] 909 if invalid: --> 910 raise ValueError("dimensions %r do not exist" % invalid) 911 912 # all indexers should be int, slice or np.ndarrays ValueError: dimensions ['space2'] do not exist ``` Is there an easier way to do this? I couldn't think of anything... CC @justinkuosixty |
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completed | 13221727 | issue |